2 files changed, 3 insertions, 1 deletions

diff --git a/embassy-stm32/Cargo.toml b/embassy-stm32/Cargo.toml
index ae92e0002..43d5250e5 100644
--- a/embassy-stm32/Cargo.toml
+++ b/embassy-stm32/Cargo.toml
@@ -21,6 +21,7 @@ sdio-host = { version = "0.5.0", optional = true }
 embedded-sdmmc = { git = "https://github.com/thalesfragoso/embedded-sdmmc-rs", branch = "async", optional = true }
 critical-section = "0.2.1"
 bare-metal = "1.0.0"
+atomic-polyfill = "0.1.2"
 
 [build-dependencies]
 regex = "1.4.6"
diff --git a/embassy-stm32/src/clock.rs b/embassy-stm32/src/clock.rs
index b4f735efa..709a2d36c 100644
--- a/embassy-stm32/src/clock.rs
+++ b/embassy-stm32/src/clock.rs
@@ -2,8 +2,9 @@
 
 use core::cell::Cell;
 use core::convert::TryInto;
-use core::sync::atomic::{compiler_fence, AtomicU32, Ordering};
+use core::sync::atomic::{compiler_fence, Ordering};
 
+use atomic_polyfill::AtomicU32;
 use embassy::interrupt::InterruptExt;
 use embassy::time::{Clock as EmbassyClock, TICKS_PER_SECOND};